Examine source code of Terrain Scanner

{
  "manifest_version": 2,
  "version": "1.2",
  "name": "Terrain Scanner - Dark",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(19, 28, 48)",
      "toolbar_text": "rgb(226, 231, 243)",
      "frame": "rgb(19, 28, 48)",
      "tab_background_text": "rgb(183, 196, 225)",
      "toolbar_field": "rgb(13, 20, 33)",
      "toolbar_field_text": "rgb(226, 231, 243)",
      "tab_line": "rgba(67, 77, 105, 0.27)",
      "popup": "rgb(13, 20, 33)",
      "popup_text": "rgb(226, 231, 243)",
      "button_background_active": "rgba(0, 0, 0, 0.5)",
      "button_background_hover": "rgba(0, 0, 0, 0.2)",
      "ntp_background": "rgb(13, 20, 33)",
      "popup_border": "rgba(67, 77, 105, 0.4)",
      "sidebar_border": "rgb(67, 77, 105)",
      "sidebar_highlight": "rgb(28, 38, 67)",
      "sidebar_text": "rgb(226, 231, 243)",
      "sidebar": "rgb(13, 20, 33)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_bottom_separator": "rgb(30, 35, 51)",
      "toolbar_field_border": "rgba(67, 77, 105, 0.27)",
      "toolbar_top_separator": "rgba(67, 77, 105, 0.27)",
      "toolbar_vertical_separator": "rgb(67, 77, 105)",
      "tab_loading": "rgba(67, 77, 105, 0.27)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fc041284-7a6f-44c5-a527-1571fae8084c}"
    }
  }
}